9+2=15-b

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Solution for 9+2=15-b equation: 



9+2=15-b

We move all terms to the left:

9+2-(15-b)=0

We add all the numbers together, and all the variables

-(-1b+15)+9+2=0

We add all the numbers together, and all the variables

-(-1b+15)+11=0

We get rid of parentheses

1b-15+11=0

We add all the numbers together, and all the variables

b-4=0

We move all terms containing b to the left, all other terms to the right

b=4

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